Sagelight is a successful and powerful photo editing package which is related to its freeware cousin, the Lightbox Free Image Editor. It is a shareware graphics application that's powerful, professional, helpful, light on system resources and feature-rich.
Here are some screenshots to illustrate the features and user interface of this application:
Praat
Able Fax Tif View
Neat Image
DeepSkyStacker
AKVIS Enhancer